2021 GENESIS G90 cooling

7-20
Maintenance
Valve Clearance (3.3 T-GDI)
Inspect for excessive valve noise
and/or engine vibration and adjust if
necessary. Have an authorized retail-
er of Genesis Branded products per-
form the operation.
Cooling System
Check cooling system components,
such as radiator, coolant reservoir,
hoses and connections for leakage
and damage. Replace any damaged
parts.
Engine Coolant
The coolant should be changed at
the intervals specified in the mainte-
nance schedule.
Automatic Transmission Fluid
Automatic transmission fluid should
not be checked under normal usage
conditions. But in severe conditions,
the fluid should be changed at an
authorized retailer of Genesis
Branded products in accordance to
the scheduled maintenance at the
beginning of this chapter.
Information
Automatic transmission fluid color is
red when new.
As the vehicle is driven, the automatic
transmission fluid will begin to look
darker. This is a normal condition and
you should not judge the need to
replace the fluid based upon the
changed color.
The use of a non-specified fluid
could result in transmission mal-
function and failure.
Use only the specified automatic
transmission fluid (refer to
"Recommended Lubricants and
Capacities" in chapter 8).
NOTICE
i

7-24
Maintenance
The high-pressure cooling system
has a reservoir filled with year-round
antifreeze coolant. The reservoir is
filled at the factory.
Check the antifreeze protection and
coolant level at least once a year, at
the beginning of the winter season
and before traveling to a colder cli-
mate.
Checking the Engine Coolant
Level
Check the condition and connections
of all cooling system hoses and
heater hoses. Replace any swollen
or deteriorated hoses.
The coolant level should be filled
between the F and the L marks on
the side of the coolant reservoir
when the engine is cool.
If the coolant level is low, add enough
distilled (deionized) water to bring
the level to the F mark, but do not
overfill. If frequent additions are
required, we recommend that you
see an authorized retailer of Genesis
Branded products for a cooling sys-
tem inspection.
ENGINE COOLANT
OHI078010
■3.3 T-GDI
OHI078012
■5.0 GDI

7-25
07
Recommended engine coolant
• When adding coolant, use only
deionized water, distilled water or
soft water for your vehicle and
never mix hard water in the coolant
filled at the factory.
• An incorrect coolant mixture can
result in severe malfunction or
engine damage.
• The engine in your vehicle has alu-
minum engine parts and must be
protected by an ethylene-glycol
with phosphate based coolant to
prevent corrosion and freezing.
• Do not use alcohol or methanol
coolant or mix them with the spec-
ified coolant.
• Do not use a solution that contains
more than 60% antifreeze or less
than 35% antifreeze, which would
reduce the effectiveness of the
solution.
For mixing percentage, refer to the
following table:
Information
If in doubt about the mix ratio, a 50%
water and 50% antifreeze mix is the
easiest to mix together as it will be the
same quantity of each. It is suitable to
use for most temperature ranges of
-31°F and higher.
i
Ambient
TemperatureMixture Percentage
(volume)
Antifreeze Water
5°F (-15°C) 35 65
-13°F (-25°C) 40 60
-31°F (-35°C) 50 50
-49°F (-45°C) 60 40
Never remove the
radiator cap or the
drain plug while the
engine and radiator
are hot. Hot coolant
and steam may blow out under
pressure, causing serious injury.
Turn the engine off and wait
until the engine cools down.
Use extreme care when remov-
ing the radiator cap. Wrap a
thick towel around it, and turn it
counterclockwise slowly to the
first stop. Step back while the
pressure is released from the
cooling system.
WARNING
OHI078013
■3.3 T-GDI
OHI078015
■5.0 GDI

7-26
Maintenance
Changing Engine Coolant
Have coolant changed by an author-
ized retailer of Genesis Branded
products according to the
Maintenance Schedule at the begin-
ning of this chapter.
To prevent damage to engine
parts, put a thick towel around the
radiator cap before refilling the
coolant to prevent the coolant
from overflowing into engine
parts, such as the alternator.
NOTICE
Do not use engine coolant or
antifreeze in the washer fluid
reservoir.
Engine coolant can severely
obscure visibility when sprayed
on the windshield and may
cause loss of vehicle control
resulting in an accident.
Engine coolant may also cause
damage to paint and body trim.
WARNING
When you are sure all the pres-
sure has been released, press
down on the cap, using a thick
towel, and continue turning
counterclockwise to remove it.
The electric motor for
the cooling fan may
continue to operate
or start up when the
engine is not running
and can cause serious injury.
Keep hands, clothing and tools
away from the rotating fan
blades of the cooling fan.
Always turn off the engine
unless the vehicle has to be
inspected with the engine on.
Be cautious as the cooling fan
may operate if the negative (-)
battery terminal is not discon-
nected.
WARNING

7-57
07
Instrument panel fuse panel
Fuse name Fuse rating Circuit protected
MODULE5 10AStop Lamp Switch, Driver/Passenger Door Module
MODULE7 10A
Electro Chromic Mirror, A/V & Navigation Head Unit, AMP,
A/C Control Module, Front A/C Controller, Air Quality
Sensor, Rear Seat Warmer Control Module LH/RH,
Driver/Passenger CCS Module, Rear CCS Module LH/RH,
Parking Collision Avoidance Assist Unit, Driver/Passenger
IMS Control Module, Rear IMS Control Module LH/RH, Rear
Seat Console Switch, Driver/Passenger Seat Warmer
Control Module
IBU3 10AIBU Control Module
E-SHIFTER2 10AElectronic ATM Shift Lever
MEMORY1 10A
Security Indicator, A/C Control Module, Front A/C Controller,
Instrument Cluster, Driver/Passenger IMS Control Module,
Rear IMS Control Module LH/RH, Head-Up Display, Analog
Clock, Driver/Passenger Seat Control Switch, Power Trunk
Module, Rear Seat Control Switch LH/RH, Driver/Passenger
Smart Key Outside Handle, Rear Smart Key Outside Handle
LH/RH, Blind Spot Collision Warning Unit LH/RH
P/SEAT
(RR LH) 225ARear IMS Control Module LH
P/SEAT
(DRV) 225ADriver IMS Control Module
P/WINDOW (RH)30APassenger Power Window Module, Rear Power Window
Module RH
MODULE 610ACrash Pad Switch, Blind Spot Collision Warning Unit LH/RH,
ECS Unit, Front Console Switch, Front Camera, Steering Tilt
& Telescopic Module
MODULE 10 10ACooling Fan Controller (BLDC), Rear Seat Console Switch,
Surround View Monitor, Parking Collision Avoidance Assist
Unit
MODULE3 10AGATEWAY (B+ (MCU)), Data Link Connector, Hazard
Switch
SUNROOF 25ASunroof Motor
P/SEAT (PASS) 225APassenger IMS Control Module

7-61
07
Engine compartment fuse panel
Fuse name Fuse rating Circuit protected
ALT 200A
Alternator, Multifuse (BATT) - B+7, COOLING FAN1, B+6,
B+5, B+4, B+3, B+1, (Fuse - WIPER1, FUEL PUMP,
POWER OUTLET1, 4WD, PRESAFETY SEAT BELT1, PRE-
SAFETY SEAT BELT2, P/DOOR DRV, P/DOOR PASS,
P/DOOR RR LH, P/DOOR RR RH, SEAT VENT DRV, SEAT
VENT PASS)
B+1 60AIGPM (Fuse - BRAKE SWITCH, MODULE14, MODULE15,
Leak Current Autocut Device) (Fuse - ROOM LAMP, MEMO-
RY1, MULTI MEDIA1, MULTI MEDIA2, MULTI MEDIA3)
B+3 60AIGPM (IPS2/IPS3, Fuse - MODULE3, E-SHIFTER1)
B+5 60AIGPM (Fuse - P/SEAT (RR LH) 2, P/SEAT (DRV) 2, P/WIN-
DOW (RH), SUNROOF, P/SEAT (PASS) 2, P/SEAT (RR LH) 1)
B+460AIGPM (IPS4/IPS8/IPS9/IPS10, Fuse - IBU1, IBU2, MOD-
ULE12)
B+6 60AMetal Core Block (PCB #1 Fuse - ECU3, IG2, MODULE1)
B+780AMetal Core Block (PCB #2 Fuse - ACC, B/UP LAMP, HORN)
B+2 60AIGPM (Fuse - P/SEAT (DRV) 1, P/SEAT (PASS) 1, P/WIN-
DOW LH, CURTAIN, POWER HANDLE)
B+8 80AMetal Core Block (PCB #1 Fuse - BLOWER FRT, POWER
OUTLET4, A/C2)
MDPS1125AMDPS Unit
POWER
OUTLET3 20AFront Power Outlet & Cigarette Lighter
POWER
OUTLET2 20AFront Power Outlet & Cigarette Lighter
VACUUM
PUMP 40A[3.3 T-GDI] Vacuum Pump Relay
ESC1 40AESC Control Module, Multipurpose Check Connector
ESC2 40AESC Control Module, Multipurpose Check Connector
DEICER 20A Front Deicer Relay